Vent cock



July 7, 1925.

H. DEL MAR VENT COCK Filed April-11, 1925 2 Sheets-Sheet 1 July 7, 1925.

H. DEL MAR VENT COCK Filed April 11, 1923 2 Sheets-Sheet 2 Patented July 7, 1925.

HARRY' DELz MAR;-

or NEW Yoan,v N-. Y.

VENT' Coeli.

Appucamnmea Aprila-1', 1923. semana. Senasa To all whom t may concern:

Be it known that I, HARRY DEL` MAR, a'. citizen of the UnitedStates',y and aresident of the city, county, and Stateof.- New York, have invented a new andr useful Improvement in Vent Cocks, of which*.tlievollowing is afull, clear, and',eXa'ctdescriptionl My inventionrelates to improven'ie'ntsAin"v vent cocks for radiators: and similar things whi'clr are used'. to permit',v the: air. toescape' from the radiator as the steam? comesin'.` There are many of' these vent cocks:` or valves; and practically none' are? satisfactony. They arevery aptltdbecome'inopeiiative either tihrougli. a collection ofi dust ink them, tlieaccumulation ofi rust, orl for other reasons, and they almost' invariably get outl of'- adjustment'. Wheni this'voocurs" the'f de# vices are generally useless'r because almosty always the' parts inl whiohi tlie difiiculty lies arevinacce'ssiblefr- My' invention isf intendedl to-y overcome these difiiculties,-an'd produ'ce a vent cock for the purpose statedtwhi'ch can be applied to a radiator or" the lile inthe usual way,- whiclr will wor-l automatically Co-permit. the escape of air, which also'hasia manually'operatedf valve' tovprof-v videI quickrelief? or' air escape when desired,

which is not; likelyY to get ouioforder; andl which is.v constructed inl suchzul way that--V i'fany difficulty does occur; tl'i'e workingl parts are jeasily accessible andiE also' easily renewable.- VVithl these' ends? in View, andwithr tlie general' objecty of' nialingV an eiicient and reliable vent cock, my invention consists of certain.V improvements which will` be hereinafterl clearly described and! claimed. f

Reference, is toi ha had: to the'L accompany ing' drawings forming a part of this' specif lic-ation, in` whiclr similar? reference charac.

ters indicate corresponding parts in; alltlie views; y

Figure l. isl a centrali vertical; section of my improved device as'. applied to a radiator column. A Y

F igure`- 2.' is a detail-seotional view show` ing'the` air relief vallveL in open posibioni Figure 3 is a plan of tl'iefI device;

Figure 4 is ai detail sectional` Viewv show'-y ing. anotherform off ai'r" valve in open posi'-` t-ion. i y

Figure 5 is" sectional View at right; angles to Figure l and showing`v they air valve closed.4 l

Figure" 6 is"- al planf view of the'v device with" the modiiiedfy valve shownini1l"ig {i1res` 4 and 5: Y Figure 7 is a modified form: of. the vent cock.

Figure Sisa' broken detailfview partly in sectionv showing means for operating the valve illustrated'iin-v Figure 7, a-nd y Fig-ure 9j is. a viewl similar to Figure 8i but Witli the valvey stem modified iir form. p rlhe'body 10 of the: structure is" intended tol be connected to? a oolumni 1111 offavradiator or' the" lileg. andI thel connectionE is made' by means of ra nipple' lQJVon. the hollow base* 13' of the valve casing: The bottom. citi thisV base of the valve casing isfclosed by a screwv plug` 14 andit.; will'. be observed? that' when" .the plug is screwed up tight iti will? bei the-- posit-ion shown in Figur-e1 1,. and'` the plug is inclinedr on top so that the baclr ofl the plug topV isfhigher chair the partV nea-11` the radiator,l and' the W'at'e'r ofI condensation or otherwise inf the' valve casing, will' followv the' inclined top of the plug into the; lower? pai'ltoff the nipple 12; andso 'bacl to thefradiator.` Immediately above' the. steaml` inlet' orf nipple l2 isf a splasher plate 1411' Whichh'asl a tendency topr'event water' from! ri'ishing up into; tlie body of the: valfvc casingi This splashe'r plate 1411Ai canbe*V supported' in man-y ways, butl3 have shown! it! 'suspended' from a: hollow plug 17v whichr screwsVint'o the interior of" the body 10 ,as`- 'shown' at 15; while the'i base l155i is screwI threaded as' shown at 16" tof fit the outer part` and lower end of the body.

'Ehe' hollow plug-.orv collar 17 carries a transverse spider 19,l and this is centrally pierced to receive" the"y guide pin" 20' which extends-l from the splasher plate; 1411 up'l through tliel plug andi into tiieY extension* rod' 211'. Tli'isrod" ispreffera'bly hollow, and" is madeofr` compositions common to the art which 'expandsl rapidly' when heated.

Atl-its: top the' expansion rodA receives a guide pinv 213 on' thel under side'oitA the topl of the" ioat 22, which isliollow, open at the; bottom, and inA cross section' is similar in ,shape to the' body l`O` which it nearly lills, leaving' ani opening between itself and the4 body fortlie' passage of air;

On the topl of' the float is a valve 231 which lits in the valve seat 24 in the top` 251 of the bodylO, this seat being provided with a` central. opening and screw threaded as" shown at 24, so tliatvitv maybe readily screwed intoplace.

a detail: vertical section of The air cock is provided with a domey 18 at the top which screws to the body 10 as shown at 35, and the air passing through the seat 24, enters the dome and passes out through the opening 30. The top 25 of the body 10 is provided with a hollow upwardly extending neck 27 having a side port 271 and connecting with the interior of the body 10 through a port 29. This is closed by a hand valve 28 which moves up and down in the neck 2.7, and has a stem 281 extending upward through the cap 31, this passing through the opening 30 above referred to, and being screwed to the neck 27 as shown. The cap .is also held against displacement by a screw 1811 which passes through the cap and engages the neck 27, and an opening 181 is provided opposite the screw and through the wall of the dome 18, in order that the screw may be easily reached. The valve 28 is normally closed by the compression spring 2811 which encircles the stem 281. At its upper end the stem 281 which'ext'ends through the cap 31, connects with a head 26 which is pivoted as shown at 33 in the fork 34 of the handle 32. Y

Thus it will be seen that in case quick and additional relief is wanted for the escape of air, one can lift the Vhandle 32 against the tension of the spring 2811, thus raising the valve 28 and permitting the air to pass out through the ports 29-271, and the openings 181 and 30. It will also be noted that normally the air and the steam behind it will pass upward into the valve casing, and as the air escapes and the steam comes in, the heat will expand the expansion rod 21, raise the float 22, and close the valve 231 thereby preventing the escape of steam. It will be further noted that the whole structure canV be easily taken apart and cleaned, or worn or defective parts replaced by new ones.

In Figures 4 to 6 I have shown a modified form of air valve, and in this case the neck 27 has a larger bore 36 extending longitudinally through it, and a transverse valve 38 is arranged to rotate in the cap 38n of the neck, and is operated by a handle 39 extending through the slot 41 in the dome 18, the handle being connected to the valve as at 40. Thus by moving the handle back and forth, the valve 38 may be opened or closed.

In Figures 7 to 9 I have shown a modified form of the structure. The lower part is as already described except that the plug 14"L has a wrench socket 14b in the bottom,and the lower end of the base is covered by a screw cap 42. As shown in these figures the body 10 has a detachable air dome 43 at the top with a vent opening 44 therein, and a diagonal duct 45 in the top plug 52 communicates with the duct 46 extending vertically through the lower part of said plug, and this one closes by a valve 47 on the top of the Y fioat 48. The fioat 48 is hollow and is filled with liquid. It has a socket 49 in the bottom riding on the pin 2O which is as already described. The vplug 52 also has a quick relief vent or duct 50 therein communicating with a duct 51 in which seats a valve 55 on the lowerl end of the stem 53 which screws into the upper part of the plug 52. This as illustrated has a squared end which can be turned by a key 56 or the like, and an opening 54 in the top of the plug 52 provides for the insertion of the key. If desired the shank of the stem 53 can be` projected above the top of the dome as in Figure 9, so that the wrench can be applied to it.

In the modified form of the valve the air passes upward through the spider 19 around the float V48 and in through the ducts 46 and 45 of the steam dome, and out through the opening 44 around the plug 52. If quick relief is sought, the valve 55 is opened and the air passes out through the ducts50 and 51. Normally the valve 55 is closed, and when air enters the cock, it passes upward and outward around the float 48 and through the ducts 46 and 45, but when steam enters, it boils the liquid inthe iioat 48, which expands upwardly and closes the valve 47 so as to shut ofi' the air outlet. Y

It will be seen that in both forms I have parts which are easily4 accessible, and which likewise can be easily separated for repairs or renewal.

I claim 1. A vent cock comprising a casing having aJlbase portion with an inlet nipple, said base portion forming a substantial chamber within it and being openable substantially itsfull diameter at the bottom, and a body portion detachably secured to the base portion and having through the top an automatic vent and a manually controlled vent, a splash plate held in the upper part of the base chamber and between it and the body part of the casing, a stem rising from the splash plate into the body of the casing, and a float guided on the stem and nearly lling the body part of the casing, said float having a valve on its upper end to close the automatic air vent.

2. A vent cock comprising a base portion having an inlet nipple and forming a substantial chamber within it, a plug closing the lower part of the base and having an inclined top pitched to dra-in into the inlet nipple, a body portion of the casing detachably secured to the base and having in the top an automatic air vent and manually controlled air vent, a splash plate between the chamber of the casing and the body part of the casing, a guide pin rising from theA splash plate into the casing body, a float guided on the pin, and a valve in the float to close the aforesaid automatic vent.

3. A vent cock comprising a three part casing, to wit, a base portion having an yin.h

let chamber and a removable plug at the bottom, a body portion detaohably lsecured to the, base portion and having an automatick air vent and a manually controlled air vent through the top, and an air dome detachably secured to the body portion and opening to the outer air, a splash plate in the upper part of the inlet chamber, a pin on the splash plate rising into the body part of the easing, and a oat guided on the aforesaid pin and nearly filling the body portion of the easing, said float having a valve thereon to close the aforesaid automatic vent.

4. A v ent oook comprising a base portion having an inlet nipple and a bottom closing plug, a body portion detaohably connected to the base portion and having an automatic air vent and a manually controlled air vent through the top, a spider detachably secured in the lower end of the body portion, a splash plate supported from the spider and having a pin extending' upward into the body of the easing, and a float guided on the aforesaid pin, said float having a valve thereonto close the aforesaid automatie vent. l

HARRY DEL MAR. 

